ICD-10-CM 2027
ICD-10 code for secondary cataract
From the official ICD-10-CM alphabetic index entry “Cataract (cortical) (immature) (incipient) › secondary”. Page updated September 29, 2026.
About coding secondary cataract
The ICD-10-CM code for secondary cataract is H26.40 (Unspecified secondary cataract). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on H26.40.
Within H26.4, choose H26.40 (Unspecified secondary cataract) only when documentation doesn't support a more specific option: Soemmering's ring (H26.41) and other secondary cataract (H26.49).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 124 (Other Disorders of the Eye with MCC or Thrombolytic Agent, relative weight 1.2471) and DRG 125 (Other Disorders of the Eye without MCC, relative weight 0.7702), in MDC 02 (Diseases and Disorders of the Eye), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific secondary cataract codes (official index)
Common questions about secondary cataract ICD-10 codes
What is the ICD-10 code for secondary cataract?
- H26.40 — Unspecified secondary cataract. More specific codes apply when the documentation supports them: H26.41, H26.49.
What is the ICD-10 code for soemmering's ring secondary cataract?
- H26.41 — Soemmering's ring (header code; choose a more specific subcode).
Is H26.40 billable?
- Yes. H26.40 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can H26.40 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict H26.40 as a principal diagnosis.
Is H26.40 a CC or MCC?
- No. H26.40 is neither a CC nor an MCC under MS-DRG v44.0.